A new technology applied to gold concentrates containing arsenic and sulphur fixing of roasting - cyanidation was studied.研究了高砷、高硫金精矿固化焙烧 — 氰化新工艺.I bored a hole so that the fixing bolt would pass through.我钻了个孔，好让固定插销穿过去。...
She pushes back her chair and stands.她把椅子往后一推，站了起来。When I give the command, everybody pushes off together.我一声令下, 大家就一起用桨把船撑离河岸.He never pushes himself forward.他从不强出风头....
She was wearing the obligatory sweater and pearl necklace.她穿着那件经常穿的毛衣，戴着那串惯常戴的珍珠项链。When an end is lawful and obligatory, the indispensable means to is are also lawful and obligatory. (Abraham Lincoln , American statesman...